Data Access Control System Accessible from Third-Party Web Server

3. The gateway server device of claim 1, wherein the decision causes a transaction to be completed at the third-party website.

5. The gateway server device of claim 1, wherein the data about the user are hosted by a plurality of data sources, and wherein the command to unlock or unfreeze the data about the user can cause the data about the user on one or more of the plurality of data sources to be unlocked or unfrozen.

8. The method of claim 6, wherein the decision causes a transaction to be completed at the third-party user interface.

10. The method of claim 6, wherein the data about the user are hosted by a plurality of data sources, and wherein the command to unlock or unfreeze the data about the user can cause the data about the user on one or more of the plurality of data sources to be unlocked or unfrozen.

11. The method of claim 6, wherein the sign-in data comprise at least one of log-in credentials or a freeze PIN.

15. The non-transitory computer-readable storage medium of claim 13, wherein the decision causes a transaction to be completed at the third-party user interface.

17. The non-transitory computer-readable storage medium of claim 13, wherein the data about the user are hosted by a plurality of data sources, and wherein the command to unlock or unfreeze the data about the user can cause the data about the user on one or more of the plurality of data sources to be unlocked or unfrozen.